Bandwidth part activation in handover with supplementary links

An apparatus of a user equipment (UE) for wireless communication, comprising:

• a first interface configured to:
• output an indication associated with the UE supporting a dual active protocol stack (DAPS) handover from a source cell or source master cell group (MCG) to a target cell or target MCG to the source cell;
• output on a normal uplink (NUL) to the source cell or source MCG in an active bandwidth part (BWP) for a NUL carrier;
• and
• output on a supplementary uplink (SUL) to the source cell or source MCG in an active BWP for a SUL carrier;
• and
• a processing system configured to:
• establish, in association with the DAPS handover being triggered, an active uplink BWP on the target cell or target MCG that is within one or more of the active BWP for the SUL carrier or the active BWP for the NUL carrier.

A method of wireless communication performed by an apparatus of a user equipment (UE), comprising:

• transmitting an indication associated with the UE supporting a dual active protocol stack (DAPS) handover from a source cell or source master cell group (MCG) to a target cell or target MCG to the source cell;
• transmitting to the source cell or source MCG on a first uplink carrier;
• and
• maintaining, during the DAPS handover, uplink transmission on the first uplink carrier when, in association with the DAPS handover being triggered, the UE is configured to:
• switch the uplink transmission from the first uplink carrier to a second uplink carrier, and
• maintain, during the DAPS handover, the uplink transmission on the first uplink carrier.